Similar to {@link #CONVMETHODUNDERSCORE} but
this one will pass only letters and numbers through and will
use as separator any character that is not a letter or a number
inside the string to be converted. The CONVMETHODXXX
constants define how names for columns and tales in the
database schema will be converted to PHP source names.

CONV_METHOD_PHPNAME

Similar to {@link #CONVMETHODUNDERSCORE} except nothing is converted to lowercase.

CONV_METHOD_NOCHANGE

Specifies no modification when converting from a schema column or table name to a PHP name.